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Mathematics 9 Online
OpenStudy (anonymous):

Solve the system by substitution. y = 2x 3x + 2y = 21 A. x = 3, y = 6 B. x = 6, y = 3 C. x = 3, y = –6 D. x = –6, y = 3

OpenStudy (cggurumanjunath):

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